John Trapp on Isaiah 30:28

Verſe 28. And his breath as an overflowing ſtream] God can blow men to deſtruction, Job 4.9. for they are but duſt-heaps: yea his breath as an irreſiſtible torrent beareth all before it. The Prophet had compared Gods fierce wrath to a raging fire; Now he further compareth it here 1. To a flood. 2. To a Fan. 3. To a Bridle.

To ſift the Nations with a ſive of vanity] i. e. Ad perdendas gentes in nihilum, as the Vulgar here hath it, to deſtroy the Nations, and to bring them to nothing.